package com.itheima.w_util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Component
public class SpringBeanHelperUtil implements ApplicationContextAware{
    
    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
    }

    public static Object getBean(String beanName){
        return context.getBean(beanName);
    }

    public static <T> T getBean(Class<T> clazz){
        return context.getBean(clazz);
    }

    public static <T> List<T> getBeans(Class<T> clazz){
        Map<String, T> beansOfType = context.getBeansOfType(clazz);
        return new ArrayList<>(beansOfType.values());
    }

}
